# MMBD4148DW

**ST Semtech** · Switching Diodes · SOT-363

MMBD4148DW from ST Semtech, in a SOT-363. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Anode | passive | Anode terminal, listed as pin 1 in the SOT-363 pin assignment; device-level limits are Reverse Voltage VR 75 V and Average Rectified Forward Current IF(AV) 200 mA. |
| 2 | Anode | passive | Anode terminal, listed as pin 2 in the SOT-363 pin assignment; device-level limits are Reverse Voltage VR 75 V and Average Rectified Forward Current IF(AV) 200 mA. |
| 3 | Anode | passive | Anode terminal, listed as pin 3 in the SOT-363 pin assignment; device-level limits are Reverse Voltage VR 75 V and Average Rectified Forward Current IF(AV) 200 mA. |
| 4 | Cathode | passive | Cathode terminal, listed as pin 4 in the SOT-363 pin assignment; device-level limits are Reverse Voltage VR 75 V and Average Rectified Forward Current IF(AV) 200 mA. |
| 5 | Cathode | passive | Cathode terminal, listed as pin 5 in the SOT-363 pin assignment; device-level limits are Reverse Voltage VR 75 V and Average Rectified Forward Current IF(AV) 200 mA. |
| 6 | Cathode | passive | Cathode terminal, listed as pin 6 in the SOT-363 pin assignment; device-level limits are Reverse Voltage VR 75 V and Average Rectified Forward Current IF(AV) 200 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ST Semtech |
| Package | SOT-363 |
| Category | Diodes |
| Pins | 6 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Peak Reverse Voltage | VRM |  |  | 100 | V |  | 1 |
| Reverse Voltage | VR |  |  | 75 | V |  | 1 |
| Average Rectified Forward Current | IF(AV) |  |  | 200 | mA |  | 1 |
| Forward Continuous Current | IFM |  |  | 300 | mA |  | 1 |
| Non-Repetitive Peak Forward Current | IFSM |  |  | 2 | A | t = 1 µs | 1 |
| Non-Repetitive Peak Forward Current | IFSM |  |  | 1 | A | t = 1 s | 1 |
| Power Dissipation | Ptot |  |  | 200 | mW |  | 1 |
| Thermal Resistance, Junction to Ambient | RθJA |  |  | 625 | ℃/W |  | 1 |
| Operating and Storage Temperature Range | Tj, Tstg | -65 |  | 150 | ℃ |  | 1 |
| Reverse Breakdown Voltage | V(BR)R | 75 |  |  | V | IR = 100 μA | 1 |
| Forward Voltage | VF |  |  | 0.715 | V | IF = 1 mA | 1 |
| Forward Voltage | VF |  |  | 0.855 | V | IF = 10 mA | 1 |
| Forward Voltage | VF |  |  | 1 | V | IF = 50 mA | 1 |
| Forward Voltage | VF |  |  | 1.25 | V | IF = 150 mA | 1 |
| Peak Reverse Current | IR |  |  | 25 | nA | VR = 20 V | 1 |
| Peak Reverse Current | IR |  |  | 1 | μA | VR = 75 V | 1 |
| Peak Reverse Current | IR |  |  | 30 | μA | VR = 25 V, Tj = 150℃ | 1 |
| Peak Reverse Current | IR |  |  | 50 | μA | VR = 75 V, Tj = 150℃ | 1 |
| Total Capacitance | CT |  |  | 2 | pF | VR = 0 V, f = 1 MHz | 1 |
| Reverse Recovery Time | trr |  |  | 4 | ns | IF = 10 mA, Irr = 0.1 X IR, RL = 100 Ω, VR = 6 V | 1 |

## CAD (KiCad official)

- Symbol: `MMBD4148DW`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `mmbd4148dw-etched.step` / `mmbd4148dw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbd4148dw.step` / `mmbd4148dw.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [ST Semtech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603152329475059712) (3 pp, sha256 `2c287c95df0c6f43`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/mmbd4148dw-datasheet.pdf)